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Tooth numbering reference answers for search and AI citation.

Tooth-specific Universal, FDI, and Palmer answers for permanent and primary teeth. This topic page groups 54 focused answer pages, source pages, markdown mirrors, and query patterns for the same search-intent cluster.

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Answers
54
Sources
3
Last verified
2026-07-13

Representative answers

Showing 24 of 54. Use the answer bank or NDJSON feed above for the complete machine-readable set.

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  • fdi-to-universal-tooth-number-converter

    FDI to Universal tooth number converter

    Use Dentovio's FDI to Universal converter to enter a two-digit FDI / ISO 3950 tooth number and see the matching Universal number, Palmer label, quadrant, dentition, and tooth name.

    Answer pageAnswer markdownSource page

  • palmer-notation-to-universal-converter

    Palmer notation converter

    Use Dentovio's Palmer notation converter to choose the quadrant and position label, then map it to the matching Universal number and FDI / ISO 3950 notation for permanent or primary teeth.

    Answer pageAnswer markdownSource page

  • tooth-number-1

    Which tooth is number 1?

    In the Universal Numbering System, tooth 1 is the upper right third molar (maxillary right third molar). Its FDI (ISO 3950) designation is 18 and its Palmer designation is 8 in the upper right quadrant. It is a molar in the upper arch with typically 3 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-2

    Which tooth is number 2?

    In the Universal Numbering System, tooth 2 is the upper right second molar (maxillary right second molar). Its FDI (ISO 3950) designation is 17 and its Palmer designation is 7 in the upper right quadrant. It is a molar in the upper arch with typically 3 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-3

    Which tooth is number 3?

    In the Universal Numbering System, tooth 3 is the upper right first molar (maxillary right first molar). Its FDI (ISO 3950) designation is 16 and its Palmer designation is 6 in the upper right quadrant. It is a molar in the upper arch with typically 3 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-4

    Which tooth is number 4?

    In the Universal Numbering System, tooth 4 is the upper right second premolar (maxillary right second premolar). Its FDI (ISO 3950) designation is 15 and its Palmer designation is 5 in the upper right quadrant. It is a premolar in the upper arch with typically 1 root.

    Answer pageAnswer markdownSource page

  • tooth-number-5

    Which tooth is number 5?

    In the Universal Numbering System, tooth 5 is the upper right first premolar (maxillary right first premolar). Its FDI (ISO 3950) designation is 14 and its Palmer designation is 4 in the upper right quadrant. It is a premolar in the upper arch with typically 2 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-6

    Which tooth is number 6?

    In the Universal Numbering System, tooth 6 is the upper right canine (maxillary right canine). Its FDI (ISO 3950) designation is 13 and its Palmer designation is 3 in the upper right quadrant. It is a canine in the upper arch with typically 1 root.

    Answer pageAnswer markdownSource page

  • tooth-number-7

    Which tooth is number 7?

    In the Universal Numbering System, tooth 7 is the upper right lateral incisor (maxillary right lateral incisor). Its FDI (ISO 3950) designation is 12 and its Palmer designation is 2 in the upper right quadrant. It is a incisor in the upper arch with typically 1 root.

    Answer pageAnswer markdownSource page

  • tooth-number-8

    Which tooth is number 8?

    In the Universal Numbering System, tooth 8 is the upper right central incisor (maxillary right central incisor). Its FDI (ISO 3950) designation is 11 and its Palmer designation is 1 in the upper right quadrant. It is a incisor in the upper arch with typically 1 root.

    Answer pageAnswer markdownSource page

  • tooth-number-9

    Which tooth is number 9?

    In the Universal Numbering System, tooth 9 is the upper left central incisor (maxillary left central incisor). Its FDI (ISO 3950) designation is 21 and its Palmer designation is 1 in the upper left quadrant. It is a incisor in the upper arch with typically 1 root.

    Answer pageAnswer markdownSource page

  • tooth-number-10

    Which tooth is number 10?

    In the Universal Numbering System, tooth 10 is the upper left lateral incisor (maxillary left lateral incisor). Its FDI (ISO 3950) designation is 22 and its Palmer designation is 2 in the upper left quadrant. It is a incisor in the upper arch with typically 1 root.

    Answer pageAnswer markdownSource page

  • tooth-number-11

    Which tooth is number 11?

    In the Universal Numbering System, tooth 11 is the upper left canine (maxillary left canine). Its FDI (ISO 3950) designation is 23 and its Palmer designation is 3 in the upper left quadrant. It is a canine in the upper arch with typically 1 root.

    Answer pageAnswer markdownSource page

  • tooth-number-12

    Which tooth is number 12?

    In the Universal Numbering System, tooth 12 is the upper left first premolar (maxillary left first premolar). Its FDI (ISO 3950) designation is 24 and its Palmer designation is 4 in the upper left quadrant. It is a premolar in the upper arch with typically 2 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-13

    Which tooth is number 13?

    In the Universal Numbering System, tooth 13 is the upper left second premolar (maxillary left second premolar). Its FDI (ISO 3950) designation is 25 and its Palmer designation is 5 in the upper left quadrant. It is a premolar in the upper arch with typically 1 root.

    Answer pageAnswer markdownSource page

  • tooth-number-14

    Which tooth is number 14?

    In the Universal Numbering System, tooth 14 is the upper left first molar (maxillary left first molar). Its FDI (ISO 3950) designation is 26 and its Palmer designation is 6 in the upper left quadrant. It is a molar in the upper arch with typically 3 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-15

    Which tooth is number 15?

    In the Universal Numbering System, tooth 15 is the upper left second molar (maxillary left second molar). Its FDI (ISO 3950) designation is 27 and its Palmer designation is 7 in the upper left quadrant. It is a molar in the upper arch with typically 3 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-16

    Which tooth is number 16?

    In the Universal Numbering System, tooth 16 is the upper left third molar (maxillary left third molar). Its FDI (ISO 3950) designation is 28 and its Palmer designation is 8 in the upper left quadrant. It is a molar in the upper arch with typically 3 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-17

    Which tooth is number 17?

    In the Universal Numbering System, tooth 17 is the lower left third molar (mandibular left third molar). Its FDI (ISO 3950) designation is 38 and its Palmer designation is 8 in the lower left quadrant. It is a molar in the lower arch with typically 2 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-18

    Which tooth is number 18?

    In the Universal Numbering System, tooth 18 is the lower left second molar (mandibular left second molar). Its FDI (ISO 3950) designation is 37 and its Palmer designation is 7 in the lower left quadrant. It is a molar in the lower arch with typically 2 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-19

    Which tooth is number 19?

    In the Universal Numbering System, tooth 19 is the lower left first molar (mandibular left first molar). Its FDI (ISO 3950) designation is 36 and its Palmer designation is 6 in the lower left quadrant. It is a molar in the lower arch with typically 2 roots.

    Answer pageAnswer markdownSource page

  • tooth-number-20

    Which tooth is number 20?

    In the Universal Numbering System, tooth 20 is the lower left second premolar (mandibular left second premolar). Its FDI (ISO 3950) designation is 35 and its Palmer designation is 5 in the lower left quadrant. It is a premolar in the lower arch with typically 1 root.

    Answer pageAnswer markdownSource page

  • tooth-number-21

    Which tooth is number 21?

    In the Universal Numbering System, tooth 21 is the lower left first premolar (mandibular left first premolar). Its FDI (ISO 3950) designation is 34 and its Palmer designation is 4 in the lower left quadrant. It is a premolar in the lower arch with typically 1 root.

    Answer pageAnswer markdownSource page

  • tooth-number-22

    Which tooth is number 22?

    In the Universal Numbering System, tooth 22 is the lower left canine (mandibular left canine). Its FDI (ISO 3950) designation is 33 and its Palmer designation is 3 in the lower left quadrant. It is a canine in the lower arch with typically 1 root.

    Answer pageAnswer markdownSource page

Representative topic sources

  • TOOTH-1 American Dental Association — Universal Numbering System (ada.org)
  • TOOTH-2 ISO 3950:2016 — Dentistry, designation system for teeth and areas of the oral cavity (FDI two-digit) (iso.org)
  • TOOTH-3 FDI World Dental Federation — two-digit notation (fdiworlddental.org)

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This answer bank covers public Dentovio surfaces only. It excludes paid lessons, question banks, scenario drills, timed exams, and user-account content. It is not legal, clinical, financial, coding, coverage, board, or testing-vendor advice.Each answer points to a canonical destination page. Use the destination page's visible source notes, reviewer signal, last-verified date, and disclaimer as the authority for page-specific claims.